As you can see from the image, there is no trace of bumpers in Fujimi's Ki-43 struts. The real springs were protected by a black cloth cover. Landing strut drawing: Nakajima Ki-43 "Oscar" Hayabusa, Aero Detail, nº 29, Dai Nippon Kaiga Co. Ltd., 2.000).

The task is pretty simple: roll the wire around the strut until you cover all the bumper section. Hold the wire tightly in one end so that it can't rotate. When you finish, cut the spare wire and glue it with a little drop of cyanocrylate.